CheckedRelativeLayout.java

/*
 * Copyright 2016 Gleb Godonoga.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.andrada.sitracker.ui.widget;

import android.annotation.SuppressLint;
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Checkable;

import org.jetbrains.annotations.NotNull;

public class CheckedRelativeLayout extends TouchDelegateRelativeLayout implements Checkable {

    private static final int[] CHECKED_STATE_SET = {
            android.R.attr.state_checked
    };

    private boolean checked = false;

    @SuppressLint("NewApi")
    public CheckedRelativeLayout(@NotNull Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public CheckedRelativeLayout(@NotNull Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public CheckedRelativeLayout(@NotNull Context context) {
        super(context);
    }

    @Override
    public boolean isChecked() {
        return checked;
    }

    @Override
    public void setChecked(boolean checked) {
        this.checked = checked;

        refreshDrawableState();

        //Propagate to children
        final int count = getChildCount();
        for (int i = 0; i < count; i++) {
            final View child = getChildAt(i);
            if (child instanceof Checkable) {
                ((Checkable) child).setChecked(checked);
            }
        }
    }

    @Override
    protected int[] onCreateDrawableState(int extraSpace) {
        final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
        if (isChecked()) {
            mergeDrawableStates(drawableState, CHECKED_STATE_SET);
        }
        return drawableState;
    }

    @Override
    public void toggle() {
        this.checked = !this.checked;
    }
}